hydrogennoun [ U ]uk /ˈhaɪ.drə.dʒən/ us /ˈhaɪ.drə.dʒən/ symbol H
- It was the end of commercial hydrogen airships.
- The gas used in the balloon is helium, which is not explosive like hydrogen, and therefore not as dangerous.
- The water coming through the vents is very rich in chemicals like hydrogen sulfide.
- These “ships of the sky” had a long metal frame covered by material that was then filled with a lighter-than-air gas, normally hydrogen.
- Water is made up of two chemicals, hydrogen and oxygen.